Iwo Grudkowski, who was 17 at the time, and a 16-year-old who cannot be named for legal reasons were on Prince of Wales Road, in the centre of Norwich, when they met the victims.

CCTV and mobile phone footage showed the encounter between the two pairs escalate into violence.

The victims, one in his 30s and another in his 20s, suffered serious injuries which required hospital treatment.

Both teenager tried to flee from the attack, in the early hours of Sunday, April 6, but the younger one was blocked by a woman and restrained by door security staff, who disarmed him.

He was arrested........

© Eastern Daily Press